Necticut



(No Model.)

- L. J. ATWOOD. 8u F. W.- TOBEY.

ARGAND LAMP.

No. 454,247. l Patented June 16, 1891.

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UNITED STATES PATENT OFFICE.

LEVIS J. ATIVOOD AND FREDERICK W. TOBEY, OF IVATERBURY, CON- NECTICUT,ASSIGNORS TO THE PLUME d:

COMPANY, OF SAME PLACE.

ATVOOD MANUFACTURING ARGAND LAM P.

SPECIFICATION forming part of Letters Patent No. 454,24*?, dated J' une16, 1891.

Application tiled January 13, 1890. Serial No, 336,788. (No model.)

To @ZZ whom t may concern,.-

wick is of a large diameter, and hence any inequality in the upper endthereof is very noticeable in the unequal burning of the flame.

In our present improvements the wick-rais- Ing devices are made ashereinafter described, so as to insure great uniformity in the raisingand lowering of the wick.

In the drawings, Figure 1 is aV vertical section of our improved lamp.Fig. 2 is a sectional plan at the line xx, and Fig. 3 is a similar viewat the line y y.

The reservoir A is supported upon any suitable base or standard B, andthe central airtube C passes through the reservoir and is iirmlyfastened at the lower end, and at the upper end the air-tube iscontracted and surrounded bya short cylinder 3, similar to thatrepresented in application, Serial No. 305,941, filed April 4., 1889, byLewis J. Atwood, and the deflector D,with the foraminous skirt 4, arealso similar to those shown in the said application.

In order to raise and lower the wick-tube we make use of the band E ofsheet metal adapted to surround thewick and having inwardly-projectingpoints cut at-the top edge of such band, so as to penetrate and hold theWick firmly in raising and lowering the same, and at opposite sides ofthis band are pivots 6, connecting with such band, the lifter F being inthe form of a half circle or yoke, and this lifter receives atits outerpart the rod` G, that passes up above the top of the reservoir A andterminates, preferably, in a knob. A spring 7 ,between the lifter-rod Gand the band E, tends to force the lifter-rod G outwardly against therim 8 of the reservoir, thereby producing sufiicient friction betweenthis lifter-rod and the reservoir to prevent the wick falling by anyconcussion or movement to which thelamp may be exposed. As an additionalguide to the wick, we prefer to make use of the sliding guide H in theform of a tube surrounding the air-tube C, but moving freely thereon,and of a sufficient length to allow the band E to surround such guideand also the clamping-band I to surround such guide II. It is preferableto make .use of projecting points 10 at the lower end of the slidingguide II to connect with the bottom portion of the wick K in order thatthe wick may be placed within the band E and drawn through the same tothe proper point, and then the wick be drawn over the sliding guide Huntil its lower end projects below sufficiently for the points 10 toenter the wick, after which the band I is wrapped around the Wick andthe ends thereof are interlocked, preferably, by having a projecting eyel2 on one end passing through a mortisc 13 near the other end, afterwhich a pin is inserted through the eye. In the clamping-band I thereare projecting clamps la at a distance apart corresponding to the widthof the hat wicks L, that become permanent or capillary feeders for themain wick K, these flat wicks L being placed between the clamps 14, andsuch clamps folded over, stuck into, and pressed down upon the flatwicks to hold them firmly to the band. When the wick K requires to bechanged, the pin 15 can be with` drawn from the eye 12 andtheclamping-band I and capillary wicks L removed and the lifter F andsliding guide II separated from the wick, and another wick introduced,as beforedescribed,andtheclamping-bandI, placed around the same. Thewick K can be raised or lowered easily, and it is guided so reliablythat the flame will not be made to burn unevenly by the raising andlowering operation, and when a fresh wick K is introduced the capillarywicks L, being separate and flat, are free to fold or turn outwardly inthe lower part of the reservoir and not interfere with the wick K beingcarriedA down to its lowest point, and during the consumption of thewick the flat wicks L serve as capillary feeders to the wick K until thelatteris consumed -sufficiently to require replacing.

The upper end of the reservoir is closed by an annular collar lll,having a rim or ilangc 1S passing down within the rim 8, and thc rim andcollar are notched for the passage of the lifter-rod G. In order tostrengthen the parts at this point it is preferable to introduce atrough-shaped piece of sheet metal 1f) at the notch and of a sizeadapted to receive the rod G, which trough-shaped strip is to be securedin place. Around the wick and connected to the collar M is the wick-tubeP, that rises above the reservoir to the same level, or nearly so, asthe top of the air-tube C, and around such wiek-tube is the foraminousair-distributer Q` that rises sufficiently high to form or be connectedwith the chimney-rest R, having around it the vertical chimney-springsR.

There is a secondary air distributer S within the air-distributer Q tolessen the risk of the flame being interfered with by external currentsof air, and these air-distribu ters and chimney-rest are removable fromthe wick-tube P, the lower ends of the air-distributers resting upon thecollar M. There is also a tubular spring-guide T surrounding thewick-tube I and connected at its lowerV end with the hase of theair-distributers, so that these parts may be easily removed from thewick-tube or replaced upon the same, as required from time to time. Theglass chimney for this lamp is of ordinary character.

XVe find that in some instances the parts become bent so that thewick-tube I is not parallel with the air-tube C, the annular space beingwider at one side than the other, and the wick, being of spougy oryielding material, is exposed to unequal friction as it is raised andlowered, and sometimes it springs or bulges outwardly between the lowerend of the wicktube I and the upper edge of the wick-raiser band E. Teprevent this by the guide-strips U, hinged at their lower ends to theupper part of the band E and having claws upon their upper ends thatpenetrate the wick, and the length of these guide-strips is such thattheir upper ends cannot pass out from below the lower end ofthewick-tube when the band E is at its extreme downward movement. Hencethese guide-strips lift the wick at the portion that is within thewicktube, and there is no possibility of lateral bulging or inequalityof movement as the wick is raised and lowered.

W'e do not herein claim any of the separate parts, as our improvementsrelate to the combination of devices, as hereinafter set forth, and wedo not herein claim lifting-claws outside the wick and passing withinthe wicktube when these are made use of in connection with ascrew-thimble for raising and lowering the wick, as these are set forthin our application No. 316,661, iiled July 6, 1889.

lVe claim as our invention- 1. The combination, with the stationarywick-tube surrounding the cylindrical wick, and the air-tube within suchwick, of alifter, a band around the wick connected with the lifter,andguide-strips connected at their lower end to the band and extending upwithin the wick-tube and provided with projections entering the wick,substantially as specified.

2. The combination, in an Argand lamp, of the band E, surrounding thewick and having points or teeth to pass into the same, the forked lifterF, passing half around the band E, andthe pivots connecting the band andthe lifter, the rod G, connected to the lifter and passing up above thetop of the reservoir, and a spring applied to the rod for insuring africtional contact thereof with the reservoir for holding the parts ofthe wick in position, substantially as set forth.

Signed by us this 7th day of January, 1890.

LEWIS J'. A'LWOOD. FRED W. TOBEY.

lVituesscs:

R. T. LATI-11N, JonN l I. lIUnLBU'r.

